Lesson - 2: Acids, Bases and Salts MCQs for Class-10 Chemistry

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MCQs for Class-X Chemistry

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Fill in the blanks

1. Bases which are soluble in water are called ______________.

2. Limestone, chalk and marble are different forms of ______________.

3. The reaction between an acid and a base to give a salt and water is known as a ___________________.

4. The atmosphere of Venus is made up of thick white and yellowish clouds of ___________.

5. Our stomach produces _____________ acid.

6. During indigestion the stomach produces too much _______ and this causes pain and irritation.

7. People use bases called ______________ to get relief from acidity.

8. The antacids ____________  the excess acid.

9. Plants require a specific __________ for their healthy growth.

10. __________ is a mild base which is used to neutralise the excess acid.

11. Tooth decay starts when the pH of the mouth is lower than ______.

12. Tooth enamel made up of _____________ is the hardest substance in our body.

13. Bacteria present in mouth produce _________ by degradation of sugar and food particles in the mouth.

14. ____________ provides a very good relief for bee-sting.

15. Stinging hair of nettle leaves inject _____________  into the body.

16, The substances whose odour changes in acidic or basic media are called _____________.

17. When the litmus solution is neither acidic nor basic its colour is ___________.

18. The salt formed by the combination of ___________ and ___________ solution is called sodium            chloride.

19. Beds of __________ were formed when seas of bygone ages dried up.

20. _______ gas is used for the manufacture of bleaching powder.

21. Baking powder is the mixture of ___________ and ___________.

22. ___________ is used in soda-acid fire extinguishers.

23. ___________ is the raw material of sodium hydroxide, baking soda , washing soda and bleaching         powder.

24. Bleaching powder is produced by the action of chlorine on ____________.

25, Chlorine is an ______________ agent in many chemical industries.

26. The chemical name of baking soda is _______.

27. _________ is used for removing permanent hardness of water.

28. Sodium carbonate is used in the manufacture of sodium compounds such as ____________.

29. ____________ is the substance used as plaster for supporting fractured bones in right position.

30. Plaster of Paris ( POP ) when mixed with water changes to ____________ which is a hard solid.

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Fill in the blanks Solution

1. Bases which are soluble in water are called alkali.

2. Limestone, chalk and marble are different forms of Calcium Carbonate.

3. The reaction between an acid and a base to give a salt and water is known as a neutralisation reaction.

4. The atmosphere of Venus is made up of thick white and yellowish clouds of sulphuric acid.

5. Our stomach produces hydrochloric acid.

6. During indigestion the stomach produces too much acid and this causes pain and irritation.

7. People use bases called antacids to get relief from acidity.

8. The antacids neutralise the excess acid.

9. Plants require a specific pH for their healthy growth.

10. Milk of magnesia ( Magnesium hydroxide ) is a mild base which is used to neutralise the excess acid.

11. Tooth decay starts when the pH of the mouth is lower than 5.5.

12. Tooth enamel made up of Calcium phosphate ( in specific Calcium hydroxyapatite ) is the hardest substance in our body.

13. Bacteria present in mouth produce acids by degradation of sugar and food particles in the mouth.

14. Baking soda ( NaHCO3 ) provides a very good relief for bee-sting.

15. Stinging hair of nettle leaves inject methanoic acid into the body.

16, The substances whose odour changes in acidic or basic media are called olfactory indicators.

17. When the litmus solution is neither acidic nor basic its colour is purple.

18. The salt formed by the combination of sodium hydroxide and hydrochloric acid solution is called sodium chloride.

19. Beds of rock salt were formed when seas of bygone ages dried up.

20. Chlorine gas is used for the manufacture of bleaching powder.

21. Baking powder is the mixture of baking soda and tartaric acid.

22. Baking soda is used in soda-acid fire extinguishers.

23. Common salt ( Sodium chloride ) is the raw material of sodium hydroxide, baking soda , washing soda and bleaching         powder.

24. Bleaching powder is produced by the action of chlorine on slaked lime ( calcium hydroxide ).

25, Chlorine is an oxidising agent in many chemical industries.

26. The chemical formula of baking soda is NaHCO3.

27. Washing soda is used for removing permanent hardness of water.

28. Sodium carbonate is used in the manufacture of sodium compounds such as borax.

29. Plaster of Paris is the substance used as plaster for supporting fractured bones in right position.

30. Plaster of Paris ( POP ) when mixed with water changes to gypsum which is a hard solid.